Luxpowertek 8-10K EU Hybrid Inverter User Manual

Luxpowertek 8-10K EU Hybrid Inverter

Product Information

Product Name: HYBRID INVERTER 8-10K EU

Version: EN-UM-1.0-00 SN: 092.0010600

Website: www.luxpowertek.com

Email: info@luxpowertek.com

Address: 5th floor, Building 11, Hengchangrong High-Tech Industrial Park, Hangcheng Street, Bao’an District, Shenzhen,China, 518100.

About This Manual

This manual provides important safety instructions and detailed information on the installation, operation, troubleshooting, and maintenance of the HYBRID INVERTER 8-10K EU.

Brief Introduction

System Solution

The HYBRID INVERTER 8-10K EU offers a comprehensive system solution for renewable energy applications. It provides options forself-usage mode, charge first mode, AC charge mode, grid peak-shaving function, and smart load function.

Product Usage Instructions

Safety Instruction

The inverter has been designed and tested strictly according to international safety regulations. It is important to read and follow all safety instructions provided in this manual before any work on or with the inverter. Only qualified personnel should perform the installation, following relevant national or international standards or regulations.

Location Selection and Installation

Before installation, ensure that the installation location meets the requirements specified in the manual. Properly install the\ inverter according to the provided instructions.

Connection Overview

Follow the system connection instructions to connect the PV, battery, grid, and EPS load to the inverter.

LCD Display

The inverter features an LCD display that provides information, alarm/fault records, and parameter settings. Refer to the manualfor instructions on viewing information, setting parameters, and navigating the LCD display.

Start-up and Shut Down

Learn how to start up and shut down the inverter correctly by following the instructions provided in the manual.

Troubleshooting & Maintenance

Regular maintenance is necessary to ensure optimal performance. The manual provides instructions on regular maintenance, troubleshooting based on LCD displays, and fan replacement.

Working with Generator

If using a generator in conjunction with the inverter, follow the instructions for generator system connection, startup and stop settings.

AC Coupling Installation Connection

If using AC coupling installation, follow the provided\ instructions for connection.

Parallel System Connection

If connecting multiple inverters in parallel, refer to the manual for instructions on the connection process.

Note:

Please refer to the complete user manual for detailed instructions and additional information.

Safety

Safety Instruction

General Safety Instructions
The inverter has been designed and tested strictly according to international safety regulations. Read all safety instructions carefully prior to any work and observe them at all times when working on or with the inverter. The operator must be qualified personnel and the installation must be capable with relevant national or international standards or regulations.
Incorrect operation or work may cause:

• injury or death to the operator or a third party
• damage to the inverter and other properties belonging to the operator or a third party.

Important Safety Notifications
There are many safety issues need to be carefully notified before, during and after the installation, and also in future operation and maintenance, following is important safety notifications to operator, owner and user of this product in appropriate usage.

Dangers of High Voltages and Large Current

• Beware of high PV voltage. Please turn-off the DC switch of PV Panel output before and during the installation to avoid electric shock.
• Beware of high grid voltage. Please turn-off the AC switch of grid connection before and during the installation to avoid electric shock.
• Beware of large current of the battery output. Please turn-off the battery module before and during the installation to avoid electric shock.
• Do not open the inverter when it’s working to avoid electric shock and damages from live voltage and current from the system.
• Do not operate the inverter when it’s working, only the LCD and buttons can be touched in limited cases by qualified personnel, other parts of the inverter can be touched when the inverter is under a safe state (e.g. fully shut-down).
• Do not connect or disconnect any connections (PV, battery, grid, communication etc.) of the inverter when it’s working.
• Make sure the inverter is well grounding, an operator should make sure himself is good protected by reasonable and professional insulation measurements (e.g. personal protective equipment (PPE)).
• Inspect relevant existed wiring on-site of the installation is under good condition before installation, operation or maintenance.
• Inspect the connections are good between inverter and PV, battery and grid during installation to prevent damages or injuries caused by bad connections.

Avoid misoperation and Inappropriate Usage

• All the work of this product (system design, installation, operation, setting , configuration and maintenance must be carried out by qualified personnel as required.
• All connections must be in accordance with local and national regulations and standards.
• Only when permitted by utility grid, the inverter and system can interconnected with the utility grid.
• All the warning lable or nameplate on the inverter must be clearly visible and must not be removed, covered or pasted.
• The installation should choose a right position and location as required in this manual with consideration to safety of users’ in future operation.
• Please keep the children away from touching or misoperation the inverter and relevant system.
• Beware of burning hurt, the inverter and some parts of the system could be hot when working, please do not touch the inverter surface or most of the parts when they are working. During inverter working states, only the LCD and buttons could be touched.

Notice

• Please carefully read this manual before any work carried out on this inverter, after the installation, please keep this manual carefully stored and easy to access at any time.
• The qualified personnel should have had training in the installation and commissioning of the electrical system as well as dealing with hazards, also they should have the knowledge of the manual and other related documents. As the installer or operator they are required to be familiar with local regulations and directives.

Brief Introduction

System Solution

This product and relevant system is suitable for following system applications (system diagram):

Installation

Packaging List & Storing

Packaging List
When the packaging is unpacked, the inner components should be the same as described in below packaging list.

Location Selection and Installation
Requirements for installation location

• a. The wall for mounting should be strong enough to bear the weight of inverter .
• b. Please maintain the minimum clearances below for adequate heat dissipation.
• c. Never install the inverter in a place with direct sunlight, rain or snow. Please refer to below figure and select a well shaded place or install a shed to protect the inverter from direct sunlight, rain and snow etc. PROTECT the LCD screen from excessive UV exposure
• d. The inverter should be installed upright on a vertical surface.

Installing the inverter

The inverter is wall-mounted type, should be installed on a vertical, solid mounting surface, such as wood studs, brick or concrete wall. Two or more persons may be needed to install the inverter due to its weight. The slots on mounting bracket can accommodate various stud spacing from 12inch(305mm) to 16.46inch(418mm).

The mounting steps are as below: (Use brick wall as example)

• Step1. Mark the positions of drill holes with the mounting bracket, then drill 4 holes of 8mm(5/16inch) diameter and make sure the depth of the holes is deeper than 50mm(2inch).
• Step2. Install the expansion bolts into the holes and tighten them, then use the corresponding nuts and washers (packaged together with the expansion bolts) to install and fix the wall-mounting bracket on the wall.
• Step3. Hang the inverter onto the wall-mounting bracket and lock the inverter on the wall using 2 self-tapping screws on the top of the inverter.

For installation on wood studs
Fasten the mounting bracket on the studs with 4 wood screws, then hang the inverter onto the bracket and lock the inverter on the wall with 2 self- tapping screws.
Please note that the wood screws and self-tapping screws are not provided with the inverter. Installers need to prepare the screws before installation.

Connection Overview

System Connection

The system connection diagram is as below( for US version):

Please prepare the breakers before connetion, breakers selection recommendation for both DC and AC

PV Breakers(2Px4)

| MPPT1 string 1 : 600V/20A MPPT1 string 2 : 600V/20A MPPT2 string 1: 600V/20A MPPT2 string 2: 600V/20A| MPPT1 string 1 : 600V/20A MPPT1 string 2 : 600V/20A MPPT2 string 1: 600V/20A MPPT2 string 2: 600V/20A
Battery Breaker(2P)| 100V/300A| 100V/300A
Main Breaker(2P)| 100A/230Vac| 100A/230Vac
Load Breaker(2P)| 63A/230Vac| 63A/230Vac
Geneartor breaker| 63A/230V| 63A/230V

Overview of Connection Ports

Overview of the cable box

a). DRM port(Applied only in AU)

b). Battery communication port(CAN&RS485)

please check Chapter 3.5.2 for Pin definition

c). CT Interface: please check Chapter 3.6.4 for CT connection
d). INV 485: Debugging port
e). Parallel communication port

please check Chapter 3.9 for Parallel connection

f). FAN1/2/3
g). TEMP: Connection for temperature sensor of lead-acid battery
h). Meter 485B&485A: For Meter communication
i). VIN/+12V: Connect a outside emergency switch on these 2 terminals
j). CAN Matching resistance: Set DIP switch when use inverters in parallel
k). GEN(NO, NC): Connection for generator auto-start function
l). DRY(NO,NC): reserved

PV Connection

PV connection of this hybrid inverter is same as traditional on-grid solar inverter (string inverter).

warning

• Please check the lowest ambient temperature of the location of the installation. The rated Voc on solar panel nameplate is obtained at 25℃ temperature. Solar panel Voc will increase with the decreasing of ambient temperature. Please ensure the Max.solar string voltage corrected at the lowest temperature not exceed the inverter max input voltage 550V for safe.

Cable Requirement:

Notice

1. The inverters has two MPPTs. Both MPPT1 and MPPT2, users can connect two strings.
2. When users connect 2 strings to MPPT, make sure the two strings has same quantity of solar panels. The inverter will limit the total MPPT1 and MPPT2 input current to 25A/25A.
3. The inverter will limit the max solar input power to 15kW for 10kw model and 12kw for 8kw model totally.

Steps for PV connection

• a. Strip off 1/4-5/16inch(6~8mm) insulation on the PV string positive and negative conductors.
• b. Use wire ferrules for PV string conductors if they are stranded wire type.
• c. Insert the conduit fitting to the opening for PV connection and tighten it from inside using the counter nut.
• d. Route the PV conductors through the conduit and conduit fitting into the inverter.
• e. Secure the cable gland in place.
• f. Ensure that the cables are connected correctly and securely. Then take appropriate measures to ensure that the conduit and conduit fittings are fastened reliably, and seal the cable entry holes.

Battery Connection

Battery power cable connection

Cable Requirement:

Step 1 : Strip 1/4-5/16inch(6-8mm) insulation from the cable end and crimp OT rings for the cable ends.
Step 2: Route the battery power cable through the cable gland, connect positive to BAT+,negative to BAT-.
Step 3: Secure the conduit fitting to the enclosure using the counter nut.
Step 4: Fasten the OT rings of battery positive and negative cables to the lugs according to the marking.
Step 5: Fix the cable gland in place.

Battery communication cable connection

A correct battery communication cable must be used to connect the battery to the inverter when users choose lithium-ion battery type. Please select ‘Lead- acid ‘ type if the lithium battery can not communicate with inverter. The battery communication port on inverter is a RJ45 socket, Pin for the RJ45 plug of the communication cable is as below. Make the communication cable according to the below inverter Pin and the correct pinout of communication port on battery. The inverter supports both CAN and
RS485 communication.

After battery power cable and communication cable connection, users need to enter Advanced setting and choose Battery type and brand on the inverter LCD

For Li-ion battery

1. Please make sure the lithium-ion battery to be used is compatible with Luxpower inverters. Please contact your distributor for updated battery compatible list.
2. If you are using multiple battery modules with the inverter, the inverter communication cable must be connected to the master battery. Please check with your battery supplier for battery master and slave settings.

For Lead-acid battery

1. The temperature sensor for lead-acid battery is optional. If you need it, please contact distributor for purchasing.
2. There are three stages for lead-acid battery charging. For charging/discharge related parameters, please check charge /discharge setting page.

Grid &EPS load Connection

Grid regulation selection
The inverter has passed the main grid-connection regulations NRS097:

Grid and EPS load connection
The inverter can be connected to the load side of the service disconnecting means if the busbar rating in the main panel can meet the NEC705.12(B)(3) requirements. Otherwise, a Line side connection can be made to avoid an expensive main panel upgrade.

AC cable connection

Cable Requirement:

• a. Strip off 5/16-3/8inch(8~10mm) insulation sleeve on the cables.
• b. Use wire ferrules if the cables are made of find stranded wires.
• c. Secure the conduit fitting to the enclosure using the counter nut of the fitting.
• d. Fasten the grid and EPS load cables to the terminal block in accordance with the markings.
• e. Secure conduit to the conduit fitting.
• f. Checks that the cables are connected correctly and securely, then take appropriate measures to ensure that the conduit and conduit fitting are secured reliably, and seal the cable entry holes.

CT/Meter Connection

To measure the power import from and export to the grid, a pair of CTs or one triphase meter must be installed at the service entry point in or near the main service panel. We standard supply 1 CT for one inverter.

CT Port Pin definition
The CT interface for 1 CTs connection is a RJ45 port ,we have made a RJ45 plug on those 1 CTs in advance, so you can connect it to port directly.

Please refer to the above connection diagram for the correct positions of CTs. The arrows on the CTs must point to inverter side.

CT Clamp Ratio
The Luxpower inverters support two ratios of CT clamp- 1000:1 and 3000:1 . The CT ratio of the CTs in the accessory bag is 1000:1. If you are using a 3rd party CT, please ensure the CT ratio is either 1000:1 or 3000:1, and then select the correct CT ratio setting in the inverter monitor page or on inverter LCD.

Extend CT clamp cable
The CT wires can be extended with a common ethernet cable if the length is not enough. A RJ45 adapter is needed for the extending. The CT wires can be extended up to 300ft(around 100m).

Working with Generator
Generator system connection

This hybrid inverter can work with generator. There are Gen ports on the inverter for generator connection.

When generator is started, all the loads connected to EPS will be supplied by the generator. Meanwhile battery will be charged.
The pass-through relay on the generator port is 50A. When generator is on, please ensure the total load and charge current will not exceed 50A.
The generator start signal shall connect to COM board GEN(NO,NC port) if users want to start generator remotely.

Generator Startup and Stop settings

Depends on the Bat charge control setting, system will use either battery SOC or battery voltage to judge if system need to start or stop the generator.

Generator Start Conditions
When utility fails and When battery is discharged to cut-off settings or there is force charge request from battery. or when the battery voltage or SOC lower than Generator Charge start Volt/SOC settings,

Generator Stop Conditions
when battery voltage or SOC higher than Charge end Volt/SOC settings value.

AC Coupling Installation Connection

The inverter supports AC coupling connection with existing grid-interactive solar system. The existing solar system is connected to the inverter’s EPS port.

When grid is on, the EPS terminal is connected to grid terminal inside inverter by a passthrough relay. so the hybrid inverter will bypass the interactive inverter AC to grid in this situation. The spec of the passthrough relay is 90A.
When grid is off, the hybrid inverter will work as a power source for the grid interactive inverter to synchronize and feed power to the micro-grid. The loads will be first supplied by solar power. If solar panels are generating more power than load consumption, the excess solar power will be stored to the battery. When solar power exceeds the sum of load power and max battery charging power, e.g. when battery is nearly full. The inverter will signal the grid interactive inverter to reduce power via the frequency shifting power reduction mechanism, thus to maintain the balance of generation and consumption of the microgrid system.
Users need to enable AC coupling function when they connect existing on grid system to EPS terminal.

Parallel System Connection
Connection for paralleling system

Please put the CAN communication PIN to on status for the first and the end inverter

If the parallel cable is not enough or long enough, please make a straight pin to pin cable

Settings for paralleling function in monitor system

1. Set up monitoring for the system, add all dongles into one station. Users can login to visit the monitor system, Configuration->Station->Plant Management->Add dongle to add dongles.
2. Enable share battery for the system if the system share one battery bank, otherwise disable the shared battery function
3. Set the system as a parallel group in the monitor system
   Please contact your inverter supplier for more detailed guidance for paralleling system

Monitor System Setup
Wifi/GPRS/4G/WLAN dongle connection

Users can use WiFi/ WLAN /4G /2G dongle to monitor their inverter, and view the monitoring data on computer or smart phone remotely.
To view data on smartphone, please download the LuxPowerView APP from Google Play or Apple APP store, then login with their user account.

Setup the monitor system

1. Sign up an account on the mobile phone APP or Website The “customer code” is a code we assigned to your distributor or installer. You can contact your supplier for their code.
2. Create station and add dongle for the station

Set homewifi password to dongle

1. Connect your mobile phone to the “BAxxxxxxxx” wireless network where “BAxxxxxxxx” is the serial number of the WiFi dongle.
2. Click the “WiFi MODULE CONNECT” button on the APP
3. Select the home WiFi that the WiFi dongle is to be connected to, enter the WiFi’s password. And then click “HomeWifi Connect”. The WiFi dongle will restart and try to connect to our server automatically.
4. Check the LEDs’ status on the WiFi dongle. The middle light should be solid lit when the WiFi dongle connects to our server successfully.
5. Now you can disconnect your mobile phone from the “BAxxxxxxxx” wireless network. Login on the APP with your account, you’ll find the inverter information already appears. Now you’ll be able to monitor and control the inverter remotely on any smart phone or computer that has Internet connection.

Please download the following guides for setting up WiFi dongle and monitoring account at Document Reference:

1. Wifi Quick Guidance
   Quick guidance for setting connection of WiFi module to home WiFi, you can also find a printed version in the packaging of the WiFi module.

2. Monitor system setup for Distributors and Monitor system setup for endusers
   Account registration, the description of each items and parameters, setting parameters

3. Lux_Monitor_UI_Introduction
   Introduction of monitor interface

Third party RS485 communication

Meter 485B&485A: when the Meter is not connected. these two pin can be used to communicate with inverter using our RS485 modbus protocol.
INV485: this interface is shared with WIFI module. If WIFI module is not in use, users can use this interface to communicate with inverter.
Please contact your distributor to get the protocol for third party APP development.

Operation Guide

Operation Mode and Function

The inverter has different working mode to meet customers’ various demands, the working modes are as below:

Self-usage Mode (Default)

In this mode, the priority order of load supply source is Solar>Battery>Grid. The priority order of solar power usage is Load>Battery>Grid.

• Application Scenarios
  Self consumption mode will increase self consumption rate of solar power and reduce the energy bill significantly

• Related Settings
  Effective when Charge Priority , AC Charge, and Forced discharge are disabled

• Example

Charge First Mode
The priority order of solar power usage will be Battery >Load >Grid. During Charge Priority time period, load is first supplied with grid power. If there is excess solar power after battery charging, the excess solar power will take load together with grid power.

• Application Scenarios
  When users want to use solar power to charge battery, grid power to supply load.

• Related Settings

• Example

AC Charge Function

Users can charge battery with grid power when electricity price is cheap, and discharge battery power to supply load or export to the grid when electricity price is high.
Application Scenarios
When users have a Time of Use(TOU) rate plan.
Related Settings

Grid peak-shaving Function

Grid peak-shaving & Grid peak-shaving power(kW):
Is used to set the maximum power that the inverter will draw from its grid power.

Smart load Function

Smart Load: This function is to make the Gen input connection point as an load connection point, if you enable it, inverter will supply power to this load when the battery SOC and PV power is above a user setup value. e.g. Smart load start SOC=90%, Smart load end SOC=85%, Start PV power=300W, it means: When the PV power exceeds 300W, and battery system SOC gets to 90%, Smart Load Port will switch on automatically to supply the load which is connected on this side. When the battery SOC<85% or PV power<300w, the Smart Load Port will switch off automatically.
Note: If you enable the Smart load function, it’s forbidden to connect the generator at the same time, otherwise the device will be damaged!

LCD Display

Users can view inverter running status, real time power, daily and accumulated energy information conveniently on inverter LCD. In addition to the above information, users can also check alarm and fault record on the display for troubleshooting.

Viewing information and alarm/fault record

• Home Page
  Touch the screen to light it up if it’s in sleep mode. The Home page will appear on the display. Users will see a system overview diagram along with the real time information of each component, such as battery SOC, battery charging/discharging power, grid import/export power, load power, etc. On the right part of the screen, users can check daily and accumulated solar energy, battery charged/discharged energy, grid imported/exported energy, as well as load consumption.

• Detailed System Information
  Click on the pie icon at the bottom of the screen, you’ll be able to view the detailed real time solar information, battery information, grid information and EPS output information.

• Fault/Alarm Information
  Touching the bell icon at the bottom of the screen, you’ll see all current and historical fault & warning information on this page.

Setting Parameters
Clicking on the gear icon at the bottom of the screen, you’ll get into the parameter setting page of the inverter.

• a. Basic settings

  • Standby: Is for users to set the inverter in normal status or in standby status. In Standby status, the inverter will stop any charging or discharging operation, as well as solar-feed-in.
  • Restart inverter: Restart the system, please note the power maybe interrupted when restart
  • Feed-in Grid: Is for users to set zero export function. If exporting solar power is not allowed, users need to disable “Feed-in Grid” option. If users’ utility meter will be tripped with even a little solar export, “Fast zero export” can be enabled thus the export detection and adjustment will take place every 20mS, which will effectively avoid any solar power being exported. If export is allowed, users can enable “Feed-in Grid” and set a maximum allowable export limit in “Feed-in Power(kW)”.

• b. Charge setting

  • Bat charge control: Users can decide to use SOC or BatV to control charge and discharge logic depends on battery type.
  • Bat charge current limit(A): users can set Max charge current.
  • AC Charge: Setting for utility charge. If users want to use grid power to charge battery, then they can enable “AC Charge”, set time periods when AC charging can happen, AC Charge power(kW) to limit utility charging power, and “Stop AC Charge SOC(%)” as the target SOC for utility charging. “Stop AC Volt(V)” as the target battery voltage for utility charging.
  • Charge first: Setting for PV charge. When uses enable Charge first, PV will charge the battery as priority, set time periods when PV charge can happen, Charge first power(kW) to limit PV charge power, and “Charge first SOC(%)” as the target SOC for PV charge first. “Charge first Volt(V)” as the target battery voltage for PV Charge first.
  • Lead acid: When uses connect Lead-acid battery, need set parameter in these programs, follow the battery manufacturer’s recommendation.
  • Generator
  • Bat charge current limit(A): Set the Max. battery charge current from Generator. Generator will start charging according to the Charge start Volt/SOC,and stop charging when the battery voltage or SOC get the Charge end Volt/SOC value.
  • Gen rated power: Maximun allowable power from generator.

• c. Discharge setting

  • Bat discharge control
    You can choose “Use SOC %” or Use Bat V” to control the battery discharge state

  • Discharge current limit(A): The Max. discharge current from battery

  • Discharge start power(W): The Min. value can be set to 50. When the inverter detect the import power is higher than this value, battery start discharging, otherwise battery will keep standby

  • On-grid EOD(%) and Off-grid EOD(%) /On-grid Cut-off(V) and Off-grid Cut off(V): End of discharge SOC/Cut off voltage in on-grid and off-grid condition respectively.

  • Forced discharge: Settings for battery force discharge within certain time period. In the preset time period, the inverter will discharge battery at the power set by “discharge power”, until battery SOC or voltage reaches “Stop discharge ”value.

• d. Advanced setting
  Advanced setting is mainly by installer after installation.

• Grid type: You can choose by yourself,230V

• Battery type: No battery, lead-acid or lithium-ion.

• If lead-acid battery is selected, please input correct battery capacity

• If lithium-ion battery is selected, please choose the battery brand in the Lithium brand drop down list.

The supported CT ratio is 1000:1 and 3000:1. default CT ratio is 1000:1. If 3rd party CT is to be used, please ensure its CT ratio is either 1000:1 or 3000:1, and set it accordingly. the battery brand in the Lithium brand drop down list.

• Meter type: Please select it according to the meter that’s to be installed.

• Offgrid output: Is for users to set if the inverter provides backup power or not when the grid is lost.
  If users want load to be seamlessly transferred to inverter backup power, “Seamless switch” must be enabled. If customers don’t have battery installed yet, but still wish to have inverter backup power with only solar panels connected, “PV Grid Off” can be enabled to use solar power to supply load when grid fails or load-shedding happens. Micro-grid: only needs to
  be set when generator is connected at the inverters grid port. With this option enabled, the inverter will use AC power to charge battery and won’t export any power through grid port if AC power is present at inverter grid port.

• Charge last: When users want to use solar power in the order of loads — grid export — battery charging.

• AC couple: When you want to use the inverter as an ac coupled model, you can enable

• CT direction reversed: When the CT is installed on the wrong direction, installer can modify it by selecting it, no need reconnect. er in the order of loads — grid export — battery charging.

Start-up and shut down the inverter

Start up the inverter

• Step1. Turn on the battery system firstly，then turn on the DC breaker between battery and inverter.
• Step2. Make sure the PV voltage of the strings are higher than 120V ,and check if the inverter works in PV charge or PV charge back-up mode.
• Step3. Make sure step1and 2 above work properly before turning on the grid power or generator breaker, and check if the inverter can go to bypass mode and on-grid mode normally.

Shut down the inverter

Danger: Do not disconnect the battery , PV and AC input power under load.
If there is emergency issue , and you have to shut down the inverter ,please follow the steps as below.

• Step1. Turn off the Grid breaker of the inverter.
• Step2. Switch off the load breaker.
• Step3. Turn off PV breaker and then battery breaker, waiting for the LCD to go off.

Troubleshooting & Maintenance

Regular Maintenance

• Inverter Maintenance
  • a. Check the inverter every 6 months or 1 year to verify if there are damages on cables, accessories, terminals and the inverter itself.
  • b. Check the inverter every 6 months to verify if the operating parameter is normal and there is no abnormal heating or noise from the inverter.
  • c. Check the inverter every 6 months to confirm there is nothing that covers the inverter heat sink, if there is, shut-down the inverter and clear the heat sink.
• Battery Maintenance
  Follow the manufacturer’s requirements on maintenance. When you carry out these works on batteries, please make sure to fully shut-down the inverter for safety consideration.

LED Displays

Troubleshooting Based On LCD Displays

Once there is any warning or fault occurring, users can troubleshoot according to the LED status and the warning/fault information on the LCD.

1. Fault on the LCD
   If the dot on the left of fault item is red, it means the fault is active. When it is grey, it means the fault is deactive

inverter, if the error still exists, contact Luxpower service or your inverter supplier.
Model fault| Incorrect model value

Eps short circuit

|

Inverter detected short-circuit on EPS output terminals

| 1.   Check if the L1, L2 and N wires are connected correctly at inverter EPS output port;

2.   Disconnect the EPS breaker to see if fault remains. If fault persists, contact Luxpower service or your inverter supplier.

Eps power reversed| Inverter detected power flowing into EPS port|

Restart inverter, if the error still exists, contact Luxpower service or your inverter supplier.

Bus short circuit| DC Bus is short circuited
Relay fault| Relay abnormal
M8 Tx failure| DSP fails to receive data from M8 microprocessor
M3 Tx failure| DSP fails to receive data from M3 microprocessor

Vbus over range

|

DC Bus voltage too high

| Please check if the PV string voltage is within the inverter specification. If string voltage is within range, and this fault still appears, contact Luxpower service or your inverter supplier.

Eps connect fault

| EPS port and grid port are connected mixed up| Check if the wires on EPS port and grid port are connected correctly. If the error exists, contact Luxpower service or your inverter supplier.

PV volt high

|

PV voltage is too high

| Please check if the PV string voltage is within the inverter specification. If string voltage is within range, and this fault still appears, contact Luxpower service o your inverter supplier.
Hard over curr| Hardware level over current protection triggered| Restart inverter, if the error still exists, contact Luxpower service or your inverter supplier.
Neutral fault| Voltage between N and PE is greater than 30V| Check if the neutral wire is connected correctly.

PV short circuit

|

Short circuit detected on PV input

| Disconnect all PV strings from the inverter. If the error persists, contact Luxpower service or your inverter supplier.

Temperature fault

|

Heat sink temperature too high

| Install the inverter in a place with good ventilation and having no direct sunlight. If the installation site is okay, please check if the NTC connector inside the inverter is loose.
Bus sample fault| Inverter detected DC bus voltage lower than PV input voltage|

Restart inverter, if the error still exists, contact Luxpower service or your inverter supplier.

Inconsistant

| Sampled grid voltage values of DSP and M8 microprocessor are inconsistent
M8 Rx fault| M8 microprocessor fails to receive data from DSP

Alarm on the LCD
If the dot on the left of fault item is yellow, it means the fault is active. When it is grey, it means the fault is deactive

Bat com failure

|

Inverter fails to communicate with battery

| Check if communication cable is correct, and if you have chosen the correct battery brand on inverter LCD. If all is correct but this error persists, please contact Luxpower service or your inverter supplier.

Meter com failure

|

Inverter fails to communicate with the meter

| 1.   Check if the communication cable is connected correctly and in good condition.

2.   Restart inverter. If the fault persists, contact Luxpower service or your inverter supplier.

Bat Fault

|

Battery cannot charge or discharge

| 1.Check the battery communication cable for correct pinout on both inverter and battery end; 2. Check if you have chosen an incorrect battery brand;

3. Check if there is fault on battery’s indicator. If there is fault, please contact your battery supplier.

Auto test failure| Auto test failed| Only applied to Italy model
Lcd com failure| LCD fails to communicate with M3 microprocessor|

Restart inverter. If fault still exists, contact Luxpower service or your inverter supplier.

Fwm mismatch| Firmware version mismatch between the microprocessors
Fan stuck| Cooling fan(s) are stuck

Trip by gfci high

|

Inverter detected leakage current on AC side

| 1. Check if there is ground fault on grid and load side

2. Restart inverter. If the fault remains, contact Luxpower service or your inverter supplier.

Trip by dci high| Inverter detected high DC injection current on grid port| Restart inverter. If the fault remains, contact Luxpower service or your inverter supplier.

PV short circuit

| Inverter detected short circuited PV input| 1.Check if each PV string is connected correctly; 2.Restart inverter. If the fault remains, contact Luxpower service or your inverter supplier.
GFCI module fault| GFCI module is abnormal| Restart inverter. If fault still exists, contact Luxpower service or your inverter supplier.
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Bat volt high| Battery voltage too high| Check if battery voltage exceeds 59.9V, battery voltage should be within inverter specification.
Bat volt low| Battery voltage too low| Check if battery voltage is under 40V, battery voltage should be within inverter specification.
Bat open| Battery is disconnected from inverter| Check battery breaker or battery fuse.
Offgrid overload| Overload on EPS port| Check if load power on inverter EPS port is within inverter specification.
Offgrid overvolt| EPS voltage is too high| Restart inverter. If fault still exists, contact Luxpower service or your inverter supplier.
Meter reversed| Meter is connected reversely| Check if meter communication cable is connected correctly on inverter and meter side.
Offgrid dcv high| High DC voltage component on EPS output when running off- grid| Restart inverter. If fault still exists, contact Luxpower service or your inverter supplier.

Fan replacement

Please check and clean the fans regularly. The recommended period is 6 months.
Please replace the fan following up the below diagram if there is problem with the fans. Turn off the system and wait for more than 5 minutes before disassembling the machine.

• a. Open the wiring cover
• b. Unplug the fan cable
• c. Loosen the screws and remove them
• d. Remove the fan fixing
• e. Loosen the waterproof connector
• f. Remove the fan and replace it
• g. After the fan is installed, follow the steps just now to push back and assemble it back

Tel： +86 0755 8520 9056
Web：www.luxpowertek.com
Email：info@luxpowertek.com

References

• Solar Power Inverters Manufacturer | Solar Inverter Factory | LuxpowerTek

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